Smokeless-combustion furnace.



No. 712,467. Paten t ed Oct. 28', 1902.

c. wsszusn. SMOKELESS COMBUSTION FURNACE.

(Application filed Dec. 3, 1 901.

(No Model.)

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UNITED STATES,

PATENT OFFICE.

CARL WEGENER, OF BERLIN, GERMANY.

SMOKELESS-COMBUSTION FURNACE.

SPECIFICATION forming part of Letters Patent No. 712,467, dated October28, 1902.

Original application filed October 17, 1900, Serial No. 83,389. Dividedand this application filed December 3, 1901. Serial No. 84,592- onmodel.)

The present invention relates to improvements in and connected with thatclass of furnaces in which the fuel is fed from underneath below anupper layer of burning fuel. By the introduction of fresh fuelunderneath the alreadyburning layer the introduced layer receives apreliminary heating from above, and the heating-gases are generated byperfectly smokeless combustion, whereby the products ofdistillation arecompletely. pass through the burningoxidized as they layer.

This invention has for its object to obtain a better combustion and amore perfect utilization or heating effect of the fuel by amore suitablegeneral arrangement of the furnace, and, further, by improved means ofintroducing the air of combustion to the different zones of theburningfuel.

The accompanying drawing shows in vertical section one form ofconstruction in which my invention may be carried into efiect.

As shown in the drawing, the combustionchamber 1, into which the freshfuel is fed through the pipe 6 by means of piston 12, is

surrounded by a pipe 39, coiledin such mannor that the top coil isnarrower than the bottom one, this coiled pipe being itself surroundedby a mantle or casing 40. The pipe 39 is connected by pipes ll and 2 toa watertank or to a steam-boiler, so that it is protected againstburning by the cooling action of the water. The sole of the combustionchamber is formed asa movable disk grate 38, the air being admittedunder pressure to the combustion-chamber by an air-passage 4 and thespacebetween contiguous coils of the pipe 39 and by an air-supply 44.The pipe is provided with a nozzle consisting of openings arrangedstep-like over one another, so as to distribute the air in everydirection, and thus insure its intimate mixing with the ascending gases.

The walls of the flue 2 for drawing off the combustion-gases may beprovided with openin gs 52 for the introduction of fresh air,where- .bythe carbon monoxid evolved is transformed into carbon dioxid.

This application is a division of my application filed October 17, 1900,Serial No. 33,389.

What I claim, and desire to secure by Letters Patent of theUnitedStates, is-- 1. ha smokeless-combustion furnace in which the freshfuel is fed. from underneath below the layer of live fuel, thecombination with the combustion-chamber, of a pipe for introducing fuelinto saidchamber, a flue for drawing ofi the combustion-gases, means forforcing the fuel through said pipe, and an airconduit for supplying airto the furnace, the combustion-chamber being formed by a coiled pipewith spaces between the coils for admission of air to the burning fuel,substantially as and for the purpose stated.

2. In a smokeless-combustion furnace in which the fresh fuel isfed'fro'm-underneath below the layer of live fuel, the combination withthe combustion-chamber formed by a coiled pipe with spaces between thecoils, of a pipe for introducing the fuel into the said the said pipe,an air-conduit for supplying airinto the space between the coiled pipeand the walls of the furnace, and an air-supply pipe for introducing airinto the live fuel,

substantially as and for the purpose stated.

, 3. In a smokeless-combustion furnace in which the fresh fuel is fedfrom underneath below the layer of live fuel, the combination with thecombustion-chamber formed by a coiled pipe with spaces between thecoils, of

a pipefor introducing the fuel into the said chamber, a -fiue fordrawing 0% the combustion-gases,a piston for forcing the fuel throughchamber, a flue for drawing off thecombustion-gases,a piston forforcingthe fuel through said pipe, an air-conduit for supplying air

